CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
CONSOLIDATED STATEMENTS OF OPERATIONS
REVENUE	$ 885,216	$ 669,761
COST OF SERVICES	732,072	546,292
Gross profit	153,144	123,469
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES	117,776	88,214
GAIN ON SALE OF ASSETS	(323)	(350)
Operating income	35,691	35,605
OTHER INCOME (EXPENSE):
Interest income	3	3
Interest expense	(2,129)	(1,497)
Changes in the fair value of contingent earn-out obligations	4,088	1,186
Other	56	(69)
Other income (expense)	2,018	(377)
INCOME BEFORE INCOME TAXES	37,709	35,228
PROVISION (BENEFIT) FOR INCOME TAXES	(49,053)	8,737
NET INCOME	$ 86,762	$ 26,491
INCOME PER SHARE:
Basic	$ 2.40	$ 0.73
Diluted	$ 2.40	$ 0.73
SHARES USED IN COMPUTING INCOME PER SHARE:
Basic	36,076	36,286
Diluted	36,188	36,499